I/you/we/they stiffen. He/she/it stiffens.
I can give you several sentences.That leather will stiffen if you let it get wet.I felt him stiffen in shock as he saw the boss walk in unexpectedly.You can stiffen lace by adding starch.
Loosen up is the opposite of stiffen up.
I tried to find the answer to this question and was unable to. I did find out he used his hat for letters, bills, and papers instead of his pockets.
Letters, Bills, and Notes
To soften a stiff wool hat, you can gently wash it in lukewarm water with a mild shampoo or conditioner. After washing, rinse thoroughly and reshape the hat while it’s still damp. Allow it to air dry flat, avoiding direct sunlight or heat sources, which can cause the fibers to stiffen again. If needed, you can also steam the hat lightly to help relax the fibers further.
You could make a hat out of almost anything. Common materials include wool (often felted) and straw.
cotton , fur, silk
Reinforcements such as crossmembers, braces, and structural adhesives are designed to stiffen a unibody structure. These components help to distribute loads more evenly, improve rigidity, and enhance the overall structural integrity of the vehicle. Additionally, the use of high-strength materials in critical areas contributes to the stiffness of the unibody design.
Sports memorabilia hats are often created using many different materials. The most common materials are combinations of cotton and nylon. These materials allow for a hat that has a nice shape, while still allowing for some personalized fit when placed on the head.
A stiffen check is a quality control measure used in manufacturing and production processes to ensure that materials or components meet specific stiffness or rigidity criteria. It typically involves testing the material's resistance to deformation under applied pressure or force. This check is crucial for ensuring that products maintain their structural integrity and performance under various conditions. In industries like aerospace, automotive, and construction, stiffen checks help prevent failures and ensure safety.
A bobble hat can be made from various materials, including polyester, but it is not exclusively made from it. Common materials for bobble hats include acrylic, wool, and cotton, in addition to polyester blends. The choice of material often depends on the desired warmth, stretch, and texture of the hat. Always check the specific product details to determine the materials used.