Are the big mesh windows and skylight always open or can you close them?

Tech Specs:

Material:

[Fly] 70D x 190T taffeta nylon 6, 1500mm polyurethane coated; [Floor] 70D x 190T nylon taffeta 10000mm polyurethane coated 

Freestanding:

No 

Poles:

4 

Doors:

2 

Clip / Sleeve:

Sleeve 

Floor Space:

[2 Person] 88 x 50in (223 x 127cm), 30sq ft (2.8sq m); [3-Person] 90 x 70in (228 x 177cm), 44sq ft (4.08sq m) 

Interior Height:

[2-Person] 42in (106cm); [3-Person] 45 in (114cm) 

Vestibule Space:

[2-Person] 18.5sq ft (1.7sq m); [3-Person] 21.5sq ft (2sq m) 

Packed Size:

24 x 7in (61 x 17cm) 

Seam Sealed:

Yes 

Ventilation:

Crystal-Mesh ceiling 

Weight:

[2-Person] 6lb 12oz (3080g); [3-Person] 8lb 14oz (4040g) 

Recommended Use:

Backcountry-camping 

Manufacturer Warranty:

Lifetime