Prism One of the best Waterproof Head Torches for Trail Running | Alpkit
Alpkit on X: "Prism 630, a 630 lumen head torch with IPX7 waterproofing, rechargeable Li-ion battery and just 195g https://t.co/WS7nogZXIg https://t.co/PkFkUbAHXP" / X
How long do you need to train for a 100km ultra run?