Small but mighty, the Duro 1.5 offers up a slim and streamlined carry for trail runners and racers looking for a minimal pack that still handles ample water. Two hydraulics soft flasks will keep you hydrated miles after your last support stop. Made with 100% recycled materials. VESTPACK SIZING The Duro/Dyna 6, 1.5 and LT come in six sizes: men s S, M, L and women s S, M, L; the Duro/Dyna 15 comes in four sizes: men s S/M and M/L and women s S/M and M/L. Based on torso length and chest circumference, these packs are sized like apparel. The surface area of the harness evenly distributes the weight of the pack on both the smaller and larger volumes. Measurements should be taken at widest part of chest slightly below armpits. MEN'S DURO 6 | 1.5 | LT INCHES S: 29.5 - 35 in M: 35 - 41 in L: 41 - 47 in CENTIMETRES S: 75 - 90 cm M: 90 - 105 cm L: 105 - 120 cm MEN'S DURO 15 INCHES S/M: 29.5 - 41 in M/L: 41 - 47 in CENTIMETRES S/M: 75 - 105 cm M/L: 105 - 120 cm