You’re looking a authentic reproduction of the classic US Army WW2 era B-3 Shearling. Before moving on to read the detailed information note that they size a bit small and therefore we highly recommend you to size up.
The Type B-3 was standardised on May 29th 1933, and remained virtually unaltered until it's discontinuation in 1943 although each original maker's B-3 had their own nuances. There are two Aero models, each manufactured to exact Military Specifications for their respective 1942 contracts. The earlier 42-5110-P has two large back panels with a centre seam over a narrow waistband while originals of the later 42-22899-P contract can be found with at least two slightly different back panel configurations, a common practice with sheepskin flight jackets on both sides of The Atlantic as the war drew on and the shortages of raw materials meant that slight variations were acceptable to the USAAF.
Aero Leather Clothing 42-5110-P uses the correct B-3 weight heavy Shearling Sheepskin with extra strong Horsehide sleeve and seam overlays for extra protection, single map pocket on the right hand side and heavy leather straps with 3-way stud collar closure for use in foul weather to enable the jacket to provide added protection to the lower part of the face. We also use the spec weight, shorter shearling for the cuffs, waistbands and windflap. This version use a Triple Marked Talon zipper on wide herringbone tape, Alloy buckles recast from originals, etc in fact everything is just as it was back then!
Although the B-3 was discontinued by the USAAF on the 23rd of May 1943, the Aero Leather 42-5110-P is still made to the identical original specification and standards as the WW2 Army Air Corps garments, many of which are still going strong after nearly 70 years of wear and our current jacket should give an equal length of service.