What features help prevent the highlighters from drying out?

The highlighters have a convenient retractable design with a safety seal that prevents them from drying out when closed.

What colors are included in the Sharpie Accent Retractable Highlighters set?

The set includes 1 Red, 1 Pink, 1 Orange, 1 Yellow, 1 Green, 1 Blue, 1 Indigo, and 1 Berry highlighter.

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Sharpie Accent Retractable Highlighters Chisel Tip Assorted Colors 8/Set 28101

Sold as 8/Set.
Bright, easy-to-see ink makes your highlighted text easy to read. Includes: 1 Red, 1 Pink, 1 Orange, 1 Yellow, 1 Green, 1 Blue, 1 Indigo, and 1 Berry highlighter. AP certified non toxic; ACMI approved.
Convenient retractable design with a safety seal that prevents the highlighters from drying out when closed. This highlighter pack comes with eight highlighters. Safety Data Sheet.
Resists smudging of many pen and marker inks (let ink dry before highlighting). Bright, see-through fluorescent inks.
Easy-glide, narrow chisel tip is great for highlighting, underlining or writing notes. Safety seal prevents leaks and dry-out so the highlighter stays fresh and ready to use.