base prompt:

1boy, solo, male, (young:1.6), cub, young child, anthro, small body proportions, (short:1.5), furry wolf, grey fur, (wolf ears:1.2), grey and white tail, aqua hair, short hair, purple eyes, aqua eyebrows, 5 fingers, 4 toes, black claws, black pawpads, detailed fur, (grey hands:0.9), white toes, (white inner thighs:1.4),
life vest, swim trunks, inner tube, sitting, grin, wet, drenched, wet fur, wet hair, in water,
riverbank, (valley:0.8), (mountains:0.6),
<lora:StS_Age_Slider_Illustrious_v1:-2>,
<lora:StS-Illustrious-Detail-Slider-v1.0:4.5>
(cinematic lighting:0.7),
expressive face, intricately detailed, masterpiece, best quality, amazing quality, very aesthetic, newest, lazympos,
Negative prompt: lowres, (bad), bad anatomy, bad hands, extra digits, multiple views, fewer, extra, missing, text, error, worst quality, jpeg artifacts, low quality, watermark, unfinished, displeasing, early, signature, artistic error, username, scan, blurry,
old, oldest, (tall:1.4), (lanky:1.4), (female:1.1), girl, girly, long hair, bulge, chubby, muscular, (human:1.2), human ears, human feet, 4 fingers, (5 toes:1.2), 3 toes, aqua fur, aqua tail, fox, thick eyebrows, markings, black inner ears, black heels, pawpads on heel, lazyneg, explicit, (pockets:1.4), white arms,
Steps: 40, Sampler: Euler a, Schedule type: Karras, CFG scale: 5.5, Seed: 220321439, Size: 1216x832, Model hash: 5901b6dd1e, Model: novaFurryXL_illustriousV50, Denoising strength: 0.4, Clip skip: 2, Hires Module 1: Use same choices, Hires CFG Scale: 4, Hires upscale: 2, Hires upscaler: 4xUltrasharpV10, Lora hashes: "StS_Age_Slider_Illustrious_v1: 33e14322c95d, StS-Illustrious-Detail-Slider-v1.0: 8fb95587c833", TI: "lazympos, lazympos", Discard penultimate sigma: True, Version: f2.0.1v1.10.1-previous-665-gae278f79, Module 1: sdxl_vae

Buckle layer:

1boy, solo, male, (young:1.6), cub, young child, anthro, small body proportions, (short:1.5), furry wolf, grey fur, (wolf ears:1.2), grey and white tail, aqua hair, short hair, purple eyes, aqua eyebrows, 5 fingers, 4 toes, black claws, black pawpads, detailed fur, (grey hands:0.9), white toes, white inner thigh,
life vest, swim trunks, inner tube, sitting, grin, wet, drenched, wet fur, wet hair, in water,
riverbank, (valley:0.8), (mountains:0.6),
<lora:StS_Age_Slider_Illustrious_v1:-2>,
<lora:StS-Illustrious-Detail-Slider-v1.0:4.5>
(cinematic lighting:0.7),
expressive face, intricately detailed, masterpiece, best quality, amazing quality, very aesthetic, newest, lazympos,
Negative prompt: lowres, (bad), bad anatomy, bad hands, extra digits, multiple views, fewer, extra, missing, text, error, worst quality, jpeg artifacts, low quality, watermark, unfinished, displeasing, early, signature, artistic error, username, scan, blurry,
old, oldest, (tall:1.4), (lanky:1.4), (female:1.1), girl, girly, long hair, bulge, chubby, muscular, (human:1.2), human ears, human feet, 4 fingers, (5 toes:1.2), 3 toes, aqua fur, aqua tail, fox, thick eyebrows, markings, black inner ears, black heels, pawpads on heel, lazyneg, explicit, (pockets:1.4), white arms,
Steps: 40, Sampler: Euler a, Schedule type: Karras, CFG scale: 5.5, Seed: 220321439, Size: 1216x832, Model hash: 5901b6dd1e, Model: novaFurryXL_illustriousV50, Denoising strength: 0.4, Clip skip: 2, Hires Module 1: Use same choices, Hires CFG Scale: 4, Hires upscale: 2, Hires upscaler: 4xUltrasharpV10, Lora hashes: "StS_Age_Slider_Illustrious_v1: 33e14322c95d, StS-Illustrious-Detail-Slider-v1.0: 8fb95587c833", TI: "lazympos, lazympos", Discard penultimate sigma: True, Version: f2.0.1v1.10.1-previous-665-gae278f79, Module 1: sdxl_vae

More vest and leg / bathing suit layering:

1boy, solo, male, (young:1.6), cub, young child, anthro, small body proportions, (short:1.5), furry wolf, grey fur, (wolf ears:1.2), grey and white tail, aqua hair, short hair, purple eyes, aqua eyebrows, 5 fingers, 4 toes, black claws, black pawpads, detailed fur, (grey hands:0.9), white toes,
life vest, swim trunks, inner tube, sitting, grin, wet, drenched, wet fur, wet hair, in water,
riverbank, (valley:0.8), (mountains:0.6),
<lora:StS_Age_Slider_Illustrious_v1:-2>,
<lora:StS-Illustrious-Detail-Slider-v1.0:4.5>
(cinematic lighting:0.7),
expressive face, intricately detailed, masterpiece, best quality, amazing quality, very aesthetic, newest, lazympos,
Negative prompt: lowres, (bad), bad anatomy, bad hands, extra digits, multiple views, fewer, extra, missing, text, error, worst quality, jpeg artifacts, low quality, watermark, unfinished, displeasing, early, signature, artistic error, username, scan, blurry,
old, oldest, (tall:1.4), (lanky:1.4), (female:1.1), girl, girly, long hair, bulge, chubby, muscular, (human:1.2), human ears, human feet, 4 fingers, (5 toes:1.1), 3 toes, aqua fur, aqua tail, fox, thick eyebrows, markings, black inner ears, black heels, pawpads on heel, lazyneg, explicit, pockets, white under arms,
Steps: 40, Sampler: Euler a, Schedule type: Karras, CFG scale: 5.5, Seed: 220321439, Size: 1216x832, Model hash: 5901b6dd1e, Model: novaFurryXL_illustriousV50, Denoising strength: 0.4, Clip skip: 2, Hires Module 1: Use same choices, Hires CFG Scale: 4, Hires upscale: 2, Hires upscaler: 4xUltrasharpV10, Lora hashes: "StS_Age_Slider_Illustrious_v1: 33e14322c95d, StS-Illustrious-Detail-Slider-v1.0: 8fb95587c833", TI: "lazympos, lazympos", freeu_enabled: True, freeu_b1: 1.01, freeu_b2: 1.02, freeu_s1: 0.99, freeu_s2: 0.95, freeu_start: 0, freeu_end: 1, Discard penultimate sigma: True, Version: f2.0.1v1.10.1-previous-665-gae278f79, Module 1: sdxl_vae