Nathan IceStorm Insulated Waist Pak (4875NBSY)

Keep your water close at hand with this lightweight, bounce-free, and chafe-free waist pak. The IceCutter Cap with Blast Valve and hand warmer pocket behind the bottle prevent fluids from freezing, and the oversized zipper pulls work well with winter running gloves. 

Extended side panels hug the body comfortably for a perfect fit, while the large zippered pocket is roomy enough for your smartphone and other running essentials. And if you need to shed a layer, the external shock cord system will keep it secure.