Ronnie Fieg has officially unveiled his latest adidas Consortium Aspen Collection, that includes the KITH adidas Ultra Boost Mid and adidas Response Trail Boost silhouettes.

The adidas Ultra Boost Mid features a ribbed sock-like appearance for a snug fit, while additional padding locks the wearer’s foot in place for a sturdy ride. Next, the upper is cage-less, instead opting for taped panels that create a subtle branding nod. Another first for adidas is the all-over Multicolored Primeknit upper, which utilizes a seasonal palette for the winter climate. The Primeknit is made from a wool-blend fabric for the winter, and is executed in a much denser knit than normal to retain warmth. Other details include added heel pulls for increased accessibility, Matte White heel cups to complement the White Boost midsole and tonal Continental outsole. Lastly, the laces are created from the same multicolored Primeknit to match the upper perfectly.

The second model, the adidas Response Trail Boost represents the evolution of the trail shoe, as it combines technical qualities with lifestyle insights. The upper features a double-layered mesh vamp and neoprene collar with premium tumbled nubuck overlays. Fieg applies asymmetrical Three Stripes logos to the speed-lace system, which offers fast and snug lacing. This performance-driven upper is mirrored by its sole unit, as the midsole is equipped with exposed Boost technology at the heel and Boost foam in the forefoot. Lastly, the Continental outsole lugs are inspired by Trail King bike tires to create extraordinary grip in all conditions.

Look for the KITH x adidas Consortium Ultra Boost Mid and Response Trail Boost to release this Friday, December 23rd, at all Kith shops. The online release will also be December 23rd at midnight 12AM EST on KithNYC.com. The Ultra Boost Mid is priced at $220 USD, and the Trail Boost is $160 USD.

A wider release to select adidas Consortium accounts will release the pack on December 31st.