Danner Men's Trailcomber 3" Hiking Shoe -Steel Gray- 63357 Size:10.5 What is the side zipper

What is the side zipper for

A Vibram® Robinson Gumlite outsole delivers multi-terrain grip on wet and dry ground

The 1821 is an uninsulated leather logger without a membrane — breathable

supportive package

Danner Men's Trailcomber 3" Hiking Shoe -Steel Gray- 63357 Size:10.5 What is the side zipperThe Lightest, Most Agile Hiker Danner Has Made There are times when climate and terrain demand lightweight, breathable footwear. The Trailcomber is the answer for warm weather hiking and exploring. At only 19 ounces per pair, it's the lightest, most agile hiker Danner has ever made. The quick drying, abrasion resistant Cordura upper adds protection, and the Vibram Litebase outsole with Megagrip provides best in class traction without the extra weight.