Integriti UKBoys Pull On School Shorts Uniform Elasticated Pull Up - Ages 2-16y (NO ZIPS OR Hooks)

Are there 2 in a pack or just One pear of shorts?

Do these have an adjustable waist?

Are these charcoal grey or lighter grey please?

Does 10-11 years old grey shorts have hook and zip? I am looking to buy one without any hooks and zip. Thanks.