This is the coolest helmet you will ever witness.

It was designed to be slightly larger than the average size head to make room for padding. You can also rip off a strap from a bike helmet to make it extra stable.

I printed with ease on the Prusa XL but you might have to slice the model a bit to fit it onto a mark 3.

https://www.temu.com/1pc-handle-cheerleading-pom-poms-cheerleading-ball-suitable-for-sports-dance-gymnastics-g-601099542768208.html?top_gallery_url=https%3A%2F%2Fimg.kwcdn.com%2Fproduct%2Ffancy%2Ffaf1ff63-1b69-42c7-ae3c-6a5a3f8f8d81.jpg&spec_gallery_id=2083565916&refer_page_sn=10009&refer_source=0&freesia_scene=2&_oak_freesia_scene=2&_oak_rec_ext_1=MTY4&search_key=pom%20pom%20with%20large%20handle&refer_page_el_sn=200049&_x_vst_scene=adg&_x_ads_sub_channel=search&_x_ads_channel=google&_x_ads_account=1213016319&_x_ads_set=19694142866&_x_ads_id=143413279342&_x_ads_creative_id=648389969513&_x_ns_source=g&_x_ns_gclid=Cj0KCQiAw6yuBhDrARIsACf94RUelqdFYGE0u8jgw0Eo_5yyECxu3hzFCFFzXe_piFwj7DliIs6NALEaAigBEALw_wcB&_x_ns_placement=&_x_ns_match_type=e&_x_ns_ad_position=&_x_ns_product_id=&_x_ns_target=&_x_ns_devicemodel=&_x_ns_wbraid=Cj4KCAiAoKeuBhADEi4A1R_IZK5oAFdUJCWu0UJLe4FS7AeVwNdAFnodvk6SYAygH4A6nOEPbXPmi76iGgIZ2w&_x_ns_gbraid=0AAAAAo4mICEz0S_BG5O22q1ZFq45LoT_j&_x_ns_keyword=temu&_x_ns_targetid=kwd-4583699489&_x_sessn_id=lwj5hnblwy&refer_page_name=search_result&refer_page_id=10009_1707845088842_31gb44cxfr

I used about 18 of these pom poms ^^^ but you can pull off the same effect with less. Just snip off the handles and there is plenty of room for glue in the slots.

There are a total of 20 slots placed on the helmet so feel free to fill all of them.

You also might want to add some foam inside so the helmet fits snug