Based on the Headband "Brasil V2", but with A4 format shield.

Reduced size/volume of both headband and the lower reinforcement. See pix for comparison.

Included two DXF for the A4 sheet as well - Portrait and Landscape.

The 3D printed headband information presented here is intended to assist the general public during the current global pandemic related to COVID-19 and the related nationwide shortage of personal protective equipment. Please be aware that this headband design is not intended to replace standard protective equipment when that equipment is available. The use of these 3D printed headbands has not been fully tested and has not been approved by federal or state authorities. The individuals associated with developing and producing this headband design assume no liability and make no representations, warranties, or guarantees regarding the safety, efficacy, or appropriate use of these headbands in any particular situation. Each facility should test each batch of headbands prior to relying on them for protection. Use of this information for any purpose is at the maker’s and user’s own risk.