Look, running vests are basically backpacks that went to finishing school. You're still hauling stuff up a mountain, but now it's distributed across your torso like some kind of organisational miracle.

But here's the thing about the Responsiv 12L – it's actually thought this whole thing through. Like when you're 15km into a trail run and suddenly realise you've become a mobile storage unit. "What's in my pockets?" becomes the new "What's for dinner?"

The Specs (Because Details Matter When You're Running Up Mountains)

Polyester monofilament mesh for better breathability and durability – because sweating is inevitable, but feeling like a wet sponge is optional
Stretch fabric for stability and comfort – moves with you, not against you (unlike that one friend who always suggests "just one more hill")
Adjustable Freelock® mictometric buckles for a perfect fit – fancy buckles that actually work, not the kind you wrestle with at 3am during an ultra
Race Vest with 9 pockets. Lower rear zipped pocket, and additional front stretch pocket – nine pockets! That's more pockets than most people have life goals
Total volume of 12 litres – enough space for all your "just in case" items that you'll probably never use but can't leave behind
1 main pocket. 11 litres, hydration compatible – because staying hydrated is the difference between "I'm crushing this" and "why did I sign up for this?"
Front pole holder system – for when your legs decide they're done and the poles become your new best friends
Adjustable chest strap design – customisable comfort, because one size fits all is a beautiful lie
Layered pockets for better internal organisation, 1 zipper – Marie Kondo would be proud of this organisational system
Reflective details front and rear – so cars can see you, and you can pretend you're a superhero at dawn
Compatible with the new quiver – sounds fancy, makes you feel like a trail-running archer
Delivered with 2 x 600ml EazyFlask – two flasks included! It's like Christmas, but sweatier

Women's size (chest cm): S (84 - 90), M (90 - 96), L (96 x 104)

Composition: 65% Polyamide 35% Polyester

COMFORT:

Body hugging race vest design, sticks to your back like a limpet! Twin elastic chest straps give freedom to breathe while at the same time avoiding bounce. The vest part of the pack uses highly breathable monofilament mesh, allowing heat and perspiration to escape.

PERFECT FIT ADJUSTMENT:

The freelock micrometric dial adjustment system on the sides of the pack allow you get a perfect fit, even on the move, as softflasks on the front empty as you drink the dials can be turned to maintain perfect tension. Set your front straps to the width you want, then use the dials to adjust fit.

ACCESSIBLE STORAGE:

With a total of 9 pockets, 6 that can be reached on the move, you can store lots of items to hand, 2 for hydration on the front, 2 stretch storage for food and more, 1 zipped front and 1 zipped lower rear for secure items. The main rear compartment is hydration compatible for a reservoir and there is an internal zipped security pocket. The external stretch rear pocket can easily hold a damp jacket and more. This is a truly versatile 12L trail running pack.

Look, you could carry everything in your hands like some kind of trail-running juggler, or you could let this vest do the heavy lifting while you focus on not tripping over roots. Your call.

Plenty Products (Lots in stock) - Dec 2025