The secret is crafted after historical originals from the thirteenth to the seventeenth centuries. During the Middle Ages the secret was worn beneath a Great Helmet and is therefore a sort of secret helmet. Amongst those engaged in one-to-one combat, the Great Helmet would be removed, and the secret was then worn as protection. Later, in the seventeenth century, noblemen wore the secret beneath their stylish hat should they still require additional protection for their heads. Secrets were sometimes even sewn into hats to render them fully invisible. The helmet is a fine addition to any Medieval, Renaissance or Golden Age costume. It may be worn beneath another helmet, under a hat, cloak, cape, and so forth. With a chin strap, the helmet may be fastened securely under the chin. The helmet is 1 mm thick and well-suited to LARP battles, costumes and Cosplay.
| Size | Length (cm) | Chest circumference | Waist circumference | Shoulder width | Head circumference | Sleeve length | Hip circumference |
| XS | 145 | 79 | 66 | 33 | 54 | 49 | 80 |
| S | 160 | 88 | 69 | 36 | 56 | 53 | 92 |
| M | 175 | 98 | 78 | 40 | 58 | 56 | 102 |
| L | 180 | 108 | 89 | 45 | 60 | 59 | 112 |
| XL | 187 | 120 | 102 | 50 | 62 | 62 | 125 |
| XXL | 194 | 139 | 118 | 55 | 64 | 63 | 144 |
| XXXL | 200 | 152 | 132 | 60 | 63 | 158 |
