Here's what other sites are saying:
Your butt can get cold pretty quick if you're sitting in water all day, which is why Immersion Research lined its classic IRS Guide Shorts with a 1mm neoprene inner short. The result is a perfect combo of comfortable style and insulation to keep you happily stomping and spinning all day long.
- Backcountry.com refers to the men's version
IR Men's Neoprene Lined Guide Shorts - The Men's Neoprene Lined Guide Shorts from IR are perfect for those cooler days on the river. A soft, durable polyester outer fabric is mated with a 0.5 mil neoprene inner short, keeping you comfy and warm. A high neoprene upper waistband keeps the shorts snug against your lower back and prevents chafing. A zip fly and lace-up waistband make getting the shorts on a breeze, yet hold them securely in place. Two self draining side pockets and a rear patch pocket give you places to stash cash or your ID. The shorts also have a grommet sewn into the back of the leg, making them easy to clip to your other gear or for hanging to dry. A loose fit, 10" inseam, and gusseted crotch keep the shorts from binding when you move. The IR Men's Neoprene Lined Guide Shorts are the sure choice when you need a little insulation from the cold water or on chilly day paddles.
- Outdoorplay refers to the men's version
The perfect technical board short for paddling and other watersports. Built with a 0.5 mil neoprene inner short sewn into the waistband. Outer fabric is soft, but durable, rip-stop polyester. Features a high back waist to keep shorts snug against lower back, prevents chaffing against backband, 'Velcro-less' fly, lace-up waistband, and hook and loop cargo pocket on side leg. Loose fit, crotch gusset, 10" inseam. DWR finish.
- Campmor refers to the men's version