hand-selected materials combining cutting-edge technologies with craftsmanship to create warmer and professional down jackets without leaking down fill.
sourced from down production places worldwide, including poland, hungary, czech, and china, hand selected superior large feathers between the chest and abdomen from animals, swiss bluesign certificate, international responsible down standard (rds) certificate, manageable, traceable and globally recognized safe down.
the higher the down content and fill power are, the more insulating capabilities the down jacket provides.
with 50% down content being the entry level, each bosideng down jacket has 90% down content.
with 480 fill power being the entry level, bosideng uses 5a down with up to 1,000 fill power.
germany needles which prevent down fill from leaking are able to effectively avoid damaging the fabric in high temperatures during the sewing process. smaller diameter needle holes are seen with delicate sewing techniques that prevents down fill leakage. for every 3cm row of stitches, it takes13 stitches. the high density and superfine fiber liner prevent down fill leakage.
extreme cold test in minus 30 degrees celsius for 24 hours, 15,000-20,000 times of rubbing in the fabric frictions test slide fastener reciprocating test for 100,000 times of zipping and pulling movement.
note: the above tests were done in the in-house lab of
gore-tex fabrics used in aerospace, military and scientific research fields are durable waterproof, wind-proof and highly ventilated, which maximizes the thermal performance of down and ensures that you are dry and comfortable in bad weather.