This is probably the lightest bivy on the market. Cuben fiber bottom and full mesh hood. Pro Level SuperLight Bivy. 2015 Mountain 10D 3X DWR Top. Pro Silnylon OD Green or White. 75 Cuben Fiber Bottom. Deep Side Zipper for easy entry/exit. Original Design: First DWR Top Style Bivy with a Net Face Window. Oversize for zero sleeping bag loft compression plus extra head room for some gear inside. What are the main functions of a water resistant (not waterproof) bivy like the SuperLight Bivy? 1: Part of the total sleep heat retention system – adds 5 – 15 degrees of warmth – especially if any slight wind at all get under/around your shelter. 3: Built in Ground Cloth. 4: Protects from any blown or splashed rain /snow that nets in under your overhead shelter. 5: Saves weight from the total shelter system. It’s a 7oz multipurpose piece of gear that allows a lighter sleeping bag, no need for a ground cloth or a separate bug protection system. Allows the use of a smaller overhead shelter. 6: Can be used alone for night temps above about 65 degrees when you do not need a sleeping bag but do need some wind/ water protection, a bit of warmth like a sheet and bug protection. 7: Can be used alone with no overhead tarp for cowboy camping. 8: Pairs perfectly with a backcountry style quilt to limit warm air venting during night moves. 9: By putting your sleep pad inside the bivy you increase the sleep pad/system thermal efficiency by limiting convective heat loss. MED 7oz / 200gms. LG 7.5oz / 215gms. XL 8oz / 230gms. 75 oz sq/yd Cuben Fiber. MED 4.5 oz / 130gms. LG 4.75oz / 140gms. XL 5oz / 150gms. Med: 74″/187cm shoulder 56″ / 142cm foot. LG: 78″ /200cm shoulder 60″/ 152cm foot. XL: 82″/215cm shoulder 64″ / 163cm foot. NOTE: Our current LG is the size of our old XL – It is quite large. The main idea in selecting a bivy size is you want it to cover your bag+pad set up without too much extra fabric or girth. If in doubt – Size Up. DUO SIZE – NOTE: Duo Size is Custom Order- Non Returnable. All Net Hood Only. Zipper down both sides to hips. Sized for two 20 X 72 X. 75″ – 2″ sleep pads with both users under 6’1. DUO IS ONE SIZE. MED Fits users up to 6″ and regular length sleeping bags and 72″ X 1.5 inflatable pads. LG Fits users up to 6’4 and long and XL bags and/or high loft winter sleep bags and 78″ X 2.5″ inflatable sleep pads. XL For users with very large pads of bags or who need extra space for gear or moving around. If in doubt on size – Size UP. We suggest trying out the fit with your pad and bag at home in a clean environment (no dog hairs please) before using. Top Fabric: MLD 2015 Mounatin 10dX10d 3xDWR Nylon Ripstop. 72oz sq/yd finished weight- Black Only DWR=Durable Water Repellant – designed to be used with overheard protection or shelter in the rain. It is not waterproof. Reg: Fits all regular size three season down bags and users to 61″ and about 185lbs using a 20″ wide or smaller pad. Large: For extra thick winter bags, long bags and users over 6’1″ / 185lbs and sleep pads more than 2.5″ thick. Size Large adds +6″ length and 4″ to girth +. Optimized head and foot box shape to fit sleep pads. Highest Quality 2015 Mountain 3xDWR 10d fabric sourced specifically for our bivys with no compromise on price or performance. #3YKK zip with two dual sided pulls extends to waist for easy entry and exit. Least expensive truly Ultralight High Performance bivy made. Half Moon bug net window over the face is large enough for good ventilation. We’ve tuned this window size just right to for the right balance of ventilation, low condensation and heat retention. Optional all bug net head- recommended for primary use in warmer climates and warmer seasons with night temps mostly above 45 degrees. This is also a better choice for very rainy and extra humid conditions and can lower condensation inside the bivy when you sweat or are forced to wear damp clothes while sleeping. Mummy shaped with large volume head and foot area. Overhead hang loop positioned over the face. Clip it up under your tarp/shelter to create more air flow around the head. Four drying hang loops- NOTE: THEY ARE NOT STAKE OUT LOOPS!!! If you use them to stake the bivy use small bungee cord and stake loosely… They are not intended to function as the corners like tent bathtub floor. The item “Mountain Laurel Designs Superlight Bivy cuben fiber floor- large NEW” is in sale since Wednesday, October 26, 2016. This item is in the category “Sporting Goods\Outdoor Sports\Camping & Hiking\Tents & Canopies\Canopies & Shelters”. The seller is “greywanderer1″ and is located in Long Beach, California. This item can be shipped to United States, to Canada, to United Kingdom, to China, to Germany, to Japan, to France, to Australia, RU, DK, RO, SK, BG, CZ, FI, HU, LV, LT, MT, EE, GR, PT, CY, SI, SE, KR, ID, to Taiwan, ZA, TH, to Belgium, to Hong Kong, to Ireland, to Netherlands, PL, to Spain, to Italy, to Austria, IL, to Mexico, to New Zealand, SG, to Switzerland, NO, SA, UA, AE, QA, KW, BH, HR, MY, BR, CL, CO, CR, DO, PA, TT, GT, SV, HN, JM.