Microfiber sunglass bags are very good with drawstring closures. They are advertised with a 'spring clasp' which is even stated on the packaging. They don't have a spring closure, but the drawstring closure works well. We haven't had them long enough to appreciate the stitch quality; They have been delayed in the last week.
Oakley Flak Jacket XLJ Sunglass Replacement Lenses & Sock Kit By BlazerBuck
39 Review
Polarized Aviator Sunglasses For Men With Military Style By SUNGAIT
36 Review
Durable Polarized Sunglasses For Men: Perfect For Fishing, Driving & Golf With 100% UV Protection By SUNGAIT
37 Review
Walleva Replacement Lenses Batwolf Sunglasses Men's Accessories
46 Review