This Scopecoat fits all 1x38 SRS Models. The Scopecoat is constructed of a 2mm neoprene laminated with nylon on the outside and the natural neoprene on th einside, allowing for a better grip. Its simple design safeguards the sight from dings and scratches, dust, dirt, and moisture. Neoprene has a 5% moisture absorbency which takes moisture (condensation and sweating) away from the sight and helps protect it from rust & corrosion. The nylon shields against the elements. Simply stretch both ends over your sight. The recommended fit is either "relaxed same length" or slightly stretched.