Comparable in weight and price to a bivy sack, but so much more comfortable. The Light Year has long been a staple of three-season cyclists and thru-hikers, both for its two-pound 11-ounce weight and its superior comfort - 113 inches long and 38 inches tall! DAC Featherlite poles help us achieve its miraculous weight, while a SuperSeal floor treated with Tent Guard with Ultra Fresh makes it long-lasting and weatherproof. Reflective guy-outs and zipper pulls trick out the feature set, making this an ultralight but fully featured shelter. Tried-and-true, the Light Year backpacks, climbs, bike tours - you name it, the Light Year has been there, done that.
Tent Apex Series Technology
Color Coded Webbing
Guides pole placement for speed and ease of set-up
Allows for quick orientation of rainfly set-up (color-coded on stake loops and on rainfly)
Constructed of durable, lightweight nylon
Swift Clips
A Sierra Designs innovation that allows the tent to be staked out before attaching the body to the pole structure
Computer Aided Design
A Sierra Designs system of using Computer Aided Design to make technically superior tents
Allows us to design tents that have a uniform distribution of stress

Dye-Free Optic White Canopy
Optic white canopies transmit light more effectively to give a brighter and more pleasant environment for long hours inside tent
Sierra Designs produces the Optic White Canopy without the use of chemical dyes
Locking Pole Tips
Keeps pole tips locked in grommet for faster, easier set up
Extended pole tips can be found on all 4-Season tents as well as the Tengu 3 and Tengu 2
A Sierra Designs innovation
SuperSeal FloorCombines benefits of catenary and bathtub floors
Raised, taped, perimeter seam provides guaranteed waterproofness
Maintains a tighter pitch with a better wind line to prevent flapping 
Lightweight Fly Material
40-denier, 1.94oz/ High-Tenacity Nylon with a 246 thread count in a Rip-stop weave
Silicone coating provides additional lightweight, waterproofness and UV protection
1500mm waterproof Polyurethane under coating allows for seam taping and is durable and waterproof
100% waterproof to 80 PSI

Tent Guard with Ultra Fresh
We begin using Tent Guard with Ultra Fresh in 2004 (a Sierra Designs exclusive at the time!) and with great success. Applied as part of the PU coating to our rain flies, floors and footprints, Tent Guard extends the life of a tent by thwarting mold, mildew and fungus. Particularly on extended trips or in damp climates, Tent Guard protects a tent if it is packed or stored temporarily while wet — another bit of piece of mind for your customers.
Specifications:
Trail Weight 2 lbs 11 oz
Fastpack Weight 1 lb 14 oz
Packed Weight 3 lbs 6 oz
Packed Size 19" x 5"
Number of Doors 1
Interior Area 20 sq. ft.
Vestibule Area 3 sq. ft.
Peak Height 38"
Floor Material 70D Nylon Taffeta, 3000mm
Body Material 40D Nylon Rip Stop
Fly Material 40D HT Nylon Rip Stop PU/Silicon, 1500mm
Number of Poles 2
Poles DAC Featherlite, 8.55mm