Material: water resistant nylon， light weight and breathablevelcro backing， easy to put on and put off2 colors availablethe best choice for outdoor or rainy season(S:back length 33 cm/neck circumference 32 cm/chest width:40-49 cm)(M:back length:38 cm/neck circumference:36 cm/chest width:46-56 cm)(L:back length:48 cm/neck circumference:46 cm/chest width:60-72 cm)(XL:back length:58 cm/neck circumference:54 cm/chest width:70-80 cm)(2XL: back length:68 cm/neck circumference:63 cm/chest width:84-100 cm)