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{"id":6701711097958,"title":"Ultraspire Summit XT 15L Backpack","handle":"ultraspire-summit-xt-lightweight-multi-use-unisex-backpack-15l-full-of-features-for-trail-running-fast-packing-and-more","description":"Hydration Included\u003cbr\u003e\u003cbr\u003eReservoir Compatible (not included): Up to 3L\u003cbr\u003e\u003cbr\u003eReservoir Compatible (not included): Up to 3L\u003cbr\u003e\u003cbr\u003eCapacity for any of our bottle sizes (not included)\u003cbr\u003e\u003cbr\u003eSizes\u003cbr\u003e\u003cbr\u003eUnisex - Universal (Chest Size: 28″-48″)\u003cbr\u003e\u003cbr\u003eUnisex - Universal (Chest Size: 26″-48″)\u003cbr\u003e\u003cbr\u003eUnisex - Universal (Chest Size: 28″-48″)\u003cbr\u003e\u003cbr\u003eWeight\u003cbr\u003e\u003cbr\u003e33 oz (935 g) with frame \/ 26 oz (737 g) without frame\u003cbr\u003e\u003cbr\u003e18 oz (510 g)\u003cbr\u003e\u003cbr\u003e11.2 oz (318 g)\u003cbr\u003e\u003cbr\u003eCapacity\u003cbr\u003e\u003cbr\u003e1830 c.i. (30 Liters)\u003cbr\u003e\u003cbr\u003e915 c.i.; 15 L\u003cbr\u003e\u003cbr\u003e915 c.i. (15 L)\u003cbr\u003e\u003cbr\u003eLine\u003cbr\u003e\u003cbr\u003eExtreme Line\u003cbr\u003e\u003cbr\u003eExtreme Line\u003cbr\u003e\u003cbr\u003eExtreme Line\u003cbr\u003e\u003cbr\u003eTechnology\u003cbr\u003e\u003cbr\u003eErgoFit, Distributed Weight, On-The-Go Pockets, Max02 XT System, XT Mesh, UltrAcool Sytsem, Sweat Proof Webbing\u003cbr\u003e\u003cbr\u003eErgoFit, Distributed Weight, On-The-Go Pockets, MaxO2 XT System, XT Mesh, UltrAcool Sytsem, Sweat Proof Webbing\u003cbr\u003e\u003cbr\u003eErgoFit, Distributed Weight, On-The-Go Pockets, Max02 XT System, XT Mesh, UltrAcool System\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eNumberless Features - the XT buckle ensures the pack remains secured during difficult upper body movements. This pack utilizes a bi-directional buckle on the waist which leverages two contact points to ensure a stable ride. On the pack’s main compartment is a string compression which keeps the pack close to the body. The aluminum toggle buckle can be used to secure an ice axe or trekking poles. An added zippered compartment within the main compartment helps to keep valuables safe and secure.\u003c\/li\u003e\n\u003cli\u003eErgoFit - Our ErgoFit design promotes freedom of movement and Stability by considering and conforming to the shape of the human body. The ErgoFit S curve shoulder straps allow your arms to move freely while reducing neck and shoulder fatigue.\u003c\/li\u003e\n\u003cli\u003eHigh Capacity and Durable - The Summit XT is a minimalist multi-use 15-liter pack. The Summit XT can carry a 2-liter reservoir. Bottle pockets added to the harness ensure this vest can carry over 3 liters of water. This pack is built with an open-air mesh which provides comfort and is incredibly breathable. The main pack body is built using a combination of XT Fabric for durability at the stress points, and 30D high tenacity nylon ripstop which balances weight\/durability in a functional way.\u003c\/li\u003e\n\u003cli\u003eFor Any Adventure - It is recommended for Trail Running, Mountain Biking, Canyoneering, Fast Packing, Mountaineering, Rock Climbing, Multi-day Endeavors. Size: Universal (Chest Size: 28″-48″) - One size fits most.\u003c\/li\u003e\n\u003cli\u003eExtreme Line - Sometimes you just need more. The Extreme Line was created with the deep adventurer at heart. These products are built to last with durable material, stronger breathable mesh, and function for any adventure scenario. This category goes beyond running and hiking and branches into mountain biking, rock climbing, skiing and so much more. 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Universal (Chest Size: 28″-48″)\u003cbr\u003e\u003cbr\u003eUnisex - Universal (Chest Size: 26″-48″)\u003cbr\u003e\u003cbr\u003eUnisex - Universal (Chest Size: 28″-48″)\u003cbr\u003e\u003cbr\u003eWeight\u003cbr\u003e\u003cbr\u003e33 oz (935 g) with frame \/ 26 oz (737 g) without frame\u003cbr\u003e\u003cbr\u003e18 oz (510 g)\u003cbr\u003e\u003cbr\u003e11.2 oz (318 g)\u003cbr\u003e\u003cbr\u003eCapacity\u003cbr\u003e\u003cbr\u003e1830 c.i. (30 Liters)\u003cbr\u003e\u003cbr\u003e915 c.i.; 15 L\u003cbr\u003e\u003cbr\u003e915 c.i. (15 L)\u003cbr\u003e\u003cbr\u003eLine\u003cbr\u003e\u003cbr\u003eExtreme Line\u003cbr\u003e\u003cbr\u003eExtreme Line\u003cbr\u003e\u003cbr\u003eExtreme Line\u003cbr\u003e\u003cbr\u003eTechnology\u003cbr\u003e\u003cbr\u003eErgoFit, Distributed Weight, On-The-Go Pockets, Max02 XT System, XT Mesh, UltrAcool Sytsem, Sweat Proof Webbing\u003cbr\u003e\u003cbr\u003eErgoFit, Distributed Weight, On-The-Go Pockets, MaxO2 XT System, XT Mesh, UltrAcool Sytsem, Sweat Proof Webbing\u003cbr\u003e\u003cbr\u003eErgoFit, Distributed Weight, On-The-Go Pockets, Max02 XT System, XT Mesh, UltrAcool System\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eNumberless Features - the XT buckle ensures the pack remains secured during difficult upper body movements. This pack utilizes a bi-directional buckle on the waist which leverages two contact points to ensure a stable ride. On the pack’s main compartment is a string compression which keeps the pack close to the body. The aluminum toggle buckle can be used to secure an ice axe or trekking poles. An added zippered compartment within the main compartment helps to keep valuables safe and secure.\u003c\/li\u003e\n\u003cli\u003eErgoFit - Our ErgoFit design promotes freedom of movement and Stability by considering and conforming to the shape of the human body. The ErgoFit S curve shoulder straps allow your arms to move freely while reducing neck and shoulder fatigue.\u003c\/li\u003e\n\u003cli\u003eHigh Capacity and Durable - The Summit XT is a minimalist multi-use 15-liter pack. The Summit XT can carry a 2-liter reservoir. Bottle pockets added to the harness ensure this vest can carry over 3 liters of water. This pack is built with an open-air mesh which provides comfort and is incredibly breathable. The main pack body is built using a combination of XT Fabric for durability at the stress points, and 30D high tenacity nylon ripstop which balances weight\/durability in a functional way.\u003c\/li\u003e\n\u003cli\u003eFor Any Adventure - It is recommended for Trail Running, Mountain Biking, Canyoneering, Fast Packing, Mountaineering, Rock Climbing, Multi-day Endeavors. Size: Universal (Chest Size: 28″-48″) - One size fits most.\u003c\/li\u003e\n\u003cli\u003eExtreme Line - Sometimes you just need more. The Extreme Line was created with the deep adventurer at heart. These products are built to last with durable material, stronger breathable mesh, and function for any adventure scenario. This category goes beyond running and hiking and branches into mountain biking, rock climbing, skiing and so much more. The Extreme Line adopts the minimalist mindset of “one item that does it all, and does it well”.\u003c\/li\u003e\n\u003c\/ul\u003e"}

Ultraspire Summit XT 15L Backpack

$125.95
Ultraspire

Ultraspire Summit XT 15L Backpack

$125.95

Grivet Members get back an estimated $13 on this item as part of their member rewards.

Maximum quantity available reached.

More from Ultraspire

Hydration Included

Reservoir Compatible (not included): Up to 3L

Reservoir Compatible (not included): Up to 3L

Capacity for any of our bottle sizes (not included)

Sizes

Unisex - Universal (Chest Size: 28″-48″)

Unisex - Universal (Chest Size: 26″-48″)

Unisex - Universal (Chest Size: 28″-48″)

Weight

33 oz (935 g) with frame / 26 oz (737 g) without frame

18 oz (510 g)

11.2 oz (318 g)

Capacity

1830 c.i. (30 Liters)

915 c.i.; 15 L

915 c.i. (15 L)

Line

Extreme Line

Extreme Line

Extreme Line

Technology

ErgoFit, Distributed Weight, On-The-Go Pockets, Max02 XT System, XT Mesh, UltrAcool Sytsem, Sweat Proof Webbing

ErgoFit, Distributed Weight, On-The-Go Pockets, MaxO2 XT System, XT Mesh, UltrAcool Sytsem, Sweat Proof Webbing

ErgoFit, Distributed Weight, On-The-Go Pockets, Max02 XT System, XT Mesh, UltrAcool System
  • Numberless Features - the XT buckle ensures the pack remains secured during difficult upper body movements. This pack utilizes a bi-directional buckle on the waist which leverages two contact points to ensure a stable ride. On the pack’s main compartment is a string compression which keeps the pack close to the body. The aluminum toggle buckle can be used to secure an ice axe or trekking poles. An added zippered compartment within the main compartment helps to keep valuables safe and secure.
  • ErgoFit - Our ErgoFit design promotes freedom of movement and Stability by considering and conforming to the shape of the human body. The ErgoFit S curve shoulder straps allow your arms to move freely while reducing neck and shoulder fatigue.
  • High Capacity and Durable - The Summit XT is a minimalist multi-use 15-liter pack. The Summit XT can carry a 2-liter reservoir. Bottle pockets added to the harness ensure this vest can carry over 3 liters of water. This pack is built with an open-air mesh which provides comfort and is incredibly breathable. The main pack body is built using a combination of XT Fabric for durability at the stress points, and 30D high tenacity nylon ripstop which balances weight/durability in a functional way.
  • For Any Adventure - It is recommended for Trail Running, Mountain Biking, Canyoneering, Fast Packing, Mountaineering, Rock Climbing, Multi-day Endeavors. Size: Universal (Chest Size: 28″-48″) - One size fits most.
  • Extreme Line - Sometimes you just need more. The Extreme Line was created with the deep adventurer at heart. These products are built to last with durable material, stronger breathable mesh, and function for any adventure scenario. This category goes beyond running and hiking and branches into mountain biking, rock climbing, skiing and so much more. The Extreme Line adopts the minimalist mindset of “one item that does it all, and does it well”.

How To Measure Your Shoe Size

Here are the best shoe size conversion charts - in US, UK, European, and inches, for men's, kid's and women's shoes. 
 
If you've ever wondered "What size shoe is a 38?" (It is a men's size 7.5 in the US) or "What is a size 40 in shoes?" (that'd be a US men's size 9.5), read on to learn how to measure shoe sizes in different countries.
 
How do you measure shoe size? It is possible to measure your own foot using a ruler or a Brannock device, but since our feet our three dimensional, this will only approximate your measurements. After you've measured your foot, try using our conversion charts below to see what your size is. Be mindful that different brands, like Altra running shoes vs. Brooks running shoes vs. Oboz hiking boots, maybe run slightly different in sizes. 
 
Women's Shoe Size Conversions
US Sizes Euro Sizes UK Sizes Inches CM
4 35 2 8.1875" 20.8
4.5 35 2.5 8.375" 21.3
5 35-36 3 8.5" 21.6
5.5 36 3.5 8.75" 22.2
6 36-37 4 8.875" 22.5
6.5 37 4.5 9.0625" 23
7 37-38 5 9.25" 23.5
7.5 38 5.5 9.375" 23.8
8 38-39 6 9.5" 24.1
8.5 39 6.5 9.6875" 24.6
9 39-40 7 9.875" 25.1
9.5 40 7.5 10" 25.4
10 40-41 8 10.1875" 25.9
10.5 41 8.5 10.3125" 26.2
11 41-42 9 10.5" 26.7
11.5 42 9.5 10.6875" 27.1
12 42-43 10 10.875" 27.6

Men's Shoe Size Conversions

US Sizes Euro Sizes UK Sizes Inches CM
6 39 5.5 9.25" 23.5
6.5 39 6 9.5" 24.1
7 40 6.5 9.625" 24.4
7.5 40-41 7 9.75" 24.8
8 41 7.5 9.9375" 25.4
8.5 41-42 8 10.125" 25.7
9 42 8.5 10.25" 26
9.5 42-43 9 10.4375" 26.7
10 43 9.5 10.5625" 27
10.5 43-44 10 10.75" 27.3
11 44 10.5 10.9375" 27.9
11.5 44-45 11 11.125" 28.3
12 45 11.5 11.25" 28.6
13 46 12.5 11.5625" 29.4
14 47 13.5 11.875" 30.2
15 48 14.5 12.1875" 31
16 49 15.5 12.5" 31.8
Big Kid Shoe Size Conversions (7 – 12 years)
US Sizes Euro Sizes UK Sizes Inches CM
3.5 35 2.5 8.625" 21.9
4 36 3 8.75" 22.2
4.5 36 3.5 9" 22.9
5 37 4 9.125" 23.2
5.5 37 4.5 9.25" 23.5
6 38 5 9.5" 24.1
6.5 38 5.5 9.625" 24.4
7 39 6 9.75" 24.8
Little Kid Shoe Size Conversions (4 – 7 years)
US Sizes Euro Sizes UK Sizes Inches CM
10.5 27 9.5 6.625" 16.8
11 28 10 6.75" 17.1
11.5 29 10.5 7" 17.8
12 30 11 7.125" 18.1
12.5 30 11.5 7.25" 18.4
13 31 12 7.5" 19.1
13.5 31 12.5 7.625" 19.4
1 32 13 7.75" 19.7
1.5 33 14 8" 20.3
2 33 1 8.125" 20.6
2.5 34 1.5 8.25" 21
3 34 2 8.5" 21.6

FAQ & Tips

  • What if I am between shoe sizes? We recommend you should size up, especially in active & sports shoes. This includes running shoes and hiking boots. 
  • Does 0.5 size make a difference in shoes? Yes, it certainly does! Wearing shoes that are too small can cause pain and injuries. Blisters, lose of toenails and bunions can all result from wearing shoes that are even 0.5 size too small. These are common ailments of beginner runners. 
  • Is one foot bigger than the other? It is common for people to have one foot that is slightly bigger than the other. Our tip is that you should buy shoes that fit the larger foot (buy pairs of shoes in the larger size of the two). 
  • Should shoes be tight or lose? Unfortunately, this is not a simple question. Shoes should not be too tight or too lose. You should be able to put a thumbs width at the end of your toe box, between your big toe and the pointy end of the shoe. You should also be able to snuggly fit your index finger between your heel and the back of the shoe. If you have not much (or not enough!) space in either of these areas, try a different size shoe. 
  • When should I try on shoes? A great tip for runners is to try on running shoes at the end of a work day. As you run, just like when you are on your feet for work, your feet swell. You will want to try on running shoes when your feet are at their largest. This allows them to still fit comfortably after a long distance run. 
  • What size shoe should I buy? This shoe chart is not a guarantee your shoes will fit. If you are in the area of Memphis, Tennessee, run on in to one of our running specialty & gear stores and our experienced fit experts will help you out!

Image below: A Brannock device is one tool run specialists use to measure shoe size. It can measure not only foot length, but also foot width. 

How to measure shoe size - Brannock Device

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