Salomon Active Skin 8 vs Nathan VaporAiress 2.0

The Salomon Active Skin 8 is the better choice for unisex fit across a wide chest range with the longest proven race record. The Nathan VaporAiress 2.0 is the better choice for women who have struggled with bounce and fit in unisex vests -- its women-specific geometry delivers a fit no unisex vest matches.

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At a glance

Spec	Salomon Active Skin 8 Hydration Vest Check price on Amazon	Nathan VaporAiress 2.0 Hydration Vest Check price on Amazon
Price	$110-$135	$140-$160
Our rating	4.8 / 5	4.7 / 5
Best for	Runners targeting 50K through 100-mile races who want the most proven race vest available.	Women runners who have struggled with bounce or poor fit in unisex or men's-cut vests.
Volume	8 liters	7 liters
Fit type	Unisex (XS-XL)	Women-specific only
Soft flasks included	2 x 500ml	2 x 600ml
Price	$155-$175	$150-$160

The two options in depth

Running Warehouse

Best Value

4.8 / 5.0

Salomon Active Skin 8 Hydration Vest

The most common vest on UTMB and Western States start lines: 8L total with a proven anti-bounce race fit and two 500ml soft flasks included.

Best for Runners targeting 50K through 100-mile races who want the most proven race vest available.

SensiFit and QuickLace system eliminates bounce across a wide chest range
4L front plus 4L rear split is the right layout for mandatory race gear
Two 500ml Salomon soft flasks included with no additional purchase
Back pocket access requires removing the vest for deep items

Price $110-$135 Check price on Amazon

Nathan Sports

4.7 / 5.0

Nathan VaporAiress 2.0 Hydration Vest

The best women-specific race vest: a dedicated female fit, 7L capacity, and two 600ml soft flasks for 50K to 100-mile use.

Best for Women runners who have struggled with bounce or poor fit in unisex or men's-cut vests.

Purpose-designed women fit with chest and waist geometry for female anatomy
Two 600ml soft flasks are the largest included flasks in the race vest category
7L capacity covers mandatory gear lists for most UTMB-category races
Higher price than the Salomon Active Skin 8 for equivalent capacity

Price $140-$160 Check price on Amazon

Which should you buy?

Buy the Salomon Active Skin 8 if you want the most proven race vest on the market with the widest size range. Its SensiFit harness eliminates bounce for most chest shapes, the 8L capacity covers 100-mile mandatory kit, and it has the most start-line pedigree of any vest in the category. Buy the Nathan VaporAiress 2.0 if you are a woman who has bounced through multiple unisex vests without finding a fit that stays put. The women-specific geometry changes the shoulder strap placement, front pocket height, and chest strap routing in ways that make a real difference at race pace.

Common questions

Can the Salomon Active Skin 8 hold a full mandatory kit list for UTMB?

For most events in the UTMB race family and comparable 100-milers, yes. The 8L vest is designed for UTMB mandatory kit compliance. Before race day, pack a test kit and verify your specific event mandatory list fits -- some events with more extensive emergency kit requirements may need a 12L vest.

Is the Nathan VaporAiress 2.0 good for a 100-miler?

At 7L, the VaporAiress 2.0 is on the edge of sufficient for 100-mile mandatory kit. It works well for most race configurations but is tight if your specific race requires extensive emergency gear. For women who prioritize fit over maximum capacity, it is the right vest. Women who need more than 7L of space should look at the Nathan VaporHowe 2.0 at 12L.

Does Salomon Active Skin 8 have a women-specific version?

Yes. The Salomon Active Skin 8 comes in both a unisex version and a women-specific version with a narrower shoulder yoke, adjusted chest strap geometry, and repositioned front pockets. The women-specific version is worth choosing if available in your size. Both versions use the same SensiFit harness technology.