The CamelBak Rain Cover is a fitted cover to protect your packs and most importantly, the contents of it, from the harsh elements.
BrandCamelBak
FeatureFeatures:Attaches securely with a Velcro closure and drawstringIncludes three easy-to-use attachment points, plus a cinch system for secure fitBright yellow gives daytime visibility; reflectivity for low-lightSmall / Medium fits Blowfish, H.A.W.G., Cloud Walker, Day Star, and other packs between 1000 and 1500 cu in