Responsiv 15L: the essentials of trail running, without compromise
The new Responsiv 15L trail running pack is designed for trail enthusiasts seeking high-performance and ergonomic gear. With its 15-liter capacity, it offers the perfect balance of lightness, capacity, and comfort, ideal for your long runs, ultras, or mountain adventures.
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Vest is great.
Watch out for its size. The measurement set in the size chart is quite precise... really check yours. I´m usually an M and had to buy an L size. When I tried it, L was the fit I required.
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Carlos · 4 days ago
Just ran the Welsh 3 peaks using the responsive 15L pack. Very comfortable and would definitely recommend it 👍
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Mark · October 10, 2026
Bag seems really small for 15l. I cannot put my phone in the pocket. In the back it does expand, but seems clearly smaller than other Brands. It is an amazing bagback, but not for 15l. I do not see how i can fit my waterbag, food and clothes in the back. In the side i can barely put few gels. For the sticks in the back, the elastics tend to open alone. At the front the elastics of the sticks are undoing alone.