Neoprene Sleeve for Standard Mouth Hydro Flask/Coffee Flask. Snug Fit Bottle with 2.6" to 3.0" Diameter. Build-in Carrying Strap. Perfect for Protection, Sweat Absorption, Insulation. Size Guide: Diameter of 2.8", height of 7.5". Guaranteed to snugly fit bottles with a diameter between 2.5" to 3". Perfectly fit 18, 21, 24 oz Standard Mouth Hydro Flask water bottle, 12, 16, 20 oz Hydro Flask Coffee Flask, and 18 oz Wide Mouth Hydro Flask water bottle. Materials: Nylon With Neoprene Cotton. Our sleeves are soft, lightweight and stretchy. Machine washable but hand wash is recommended. Handwashing preserves the life of the sleeves as in any materials that are machine washed because of the harsh detergents and rigorous cycles. Functions: Suitable for indoor and outdoor use. Primarily protect bottles from dents, scratches or breaks on impacts. Neoprene sleeves will also absorb sweats produce by the cold drink from the wall of the bottle and provides insulation to protect your hands from cold or hot bottles. Also, come with a looped handle for easy carrying. Multi-Color: Pack of 5 sleeves comes in black, blue, pink, grey and green colors. Pack of 8 sleeves will add yellow, teal and purple colors. Choose the color suitable for your bottle, mix and match however you wish. Safety: Nylon with neoprene cotton is harmless materials. Although the sleeves will provide some degree of protection, it will not guarantee full protection from heavy impacts, so drop tests are not recommended. A small air vent hole at the bottom lets air out, which can make it easy to push in and pull out your bottle. Snugly fit bottles with a diameter between 2.5&#034; to 3&#034;. Nylon With Neoprene Cotton. Soft, lightweight and stretchy. Machine washable. Multiple color selection. Carrying handle.